Medical Center New York, N.Y. : units cooperating The Presbyterian Hospital in the City of New York, The Presbyterian Hospital School of Nursing, Harkness Pavilion for Private Patients, Squier Urological Clinic, Sloane Hospital for Women, Columbia University College of Physicians and Surgeons, Columbia University School of Dental and Oral Surgery, The Babies' Hospital of the City of New York, The Neurological Institute of New York, Vanderbilt Clinic, New York State Psychiatric Institute and Hospital